Javascript 滑动切换jquery将不显示

我只是想问，为什么我用JSFIDLE构建一个ul li结构的档案，使用slidetoggle，year>month>title，但当我将它应用到我的档案部分时，只有year和month有效，标题不会显示，css对此有问题吗

   <?php 
include("connection/connect.php"); 

$sql2 = mysqli_query($con, "SELECT DISTINCT YEAR(post_date) FROM posts ORDER BY YEAR(post_date) DESC");
                echo "<div id='nav'><ul>";

                while($row2 = mysqli_fetch_assoc($sql2)){ 
                    foreach ($row2 as $year) {  
                    echo "<li class='current'><b>$year</b><ul>"; //year
                        $sql3 = mysqli_query($con, "SELECT DISTINCT MONTH(post_date) FROM posts WHERE YEAR(post_date)='$year' ORDER by MONTH(post_date) DESC");

                        while($row3 = mysqli_fetch_assoc($sql3)){ 
                            foreach ($row3 as $month) {  

                                echo "<li><a style='text-transform: none; color:#333; font-size: 14px;'>".date('F', mktime(0, 0, 0, $month, 1, 2000))."</a><ul>"; //month

                                $sql4 = mysqli_query($con, "SELECT * FROM posts WHERE MONTH(post_date)='$month' AND YEAR(post_date)='$year' ORDER by post_date DESC");
                                while($row4 = mysqli_fetch_assoc($sql4)){ 
                                    $title2 = $row4['post_title']; 
                                    echo "<ul><li><a style='text-transform: none; color:#333; font-size: 12px;' href='pages.php?id={$row4['post_id']}'>".$title2."</a></li></ul>";//title
                                } 
                            }  
                            echo "</ul></li>"; //end month
                        } 
                    echo "</ul></li>"; //end year
                    }  
                } 
                echo "</ul></div>"; 

    }
    ?>

我希望你能在这方面帮助我，提前谢谢你

---

你可以检查一下我的小提琴，

最后，我得到了答案。。我在标题附近添加了一个多余的标签，这就是为什么它不显示的原因，删除它后，现在我的档案工作得很好

<?php 
            include("connection/connect.php"); 

            $select_posts = "SELECT post_id,post_date,post_title, YEAR(post_date) AS YEAR, MONTH(post_date) AS MONTH, COUNT(*) AS postCount FROM posts";

            $run_posts = mysqli_query($con, $select_posts);

            while ($row = mysqli_fetch_array($run_posts)){

            $sql2 = mysqli_query($con, "SELECT DISTINCT YEAR(post_date) FROM posts ORDER BY YEAR(post_date) DESC");
            echo "<div id='nav'><ul>";

            while($row2 = mysqli_fetch_assoc($sql2)){ 
                foreach ($row2 as $year) {  
                echo "<li class='current'><b>$year</b><ul>"; //year
                    $sql3 = mysqli_query($con, "SELECT DISTINCT MONTH(post_date) FROM posts WHERE YEAR(post_date)='$year' ORDER by MONTH(post_date) DESC");

                    while($row3 = mysqli_fetch_assoc($sql3)){ 
                        foreach ($row3 as $month) {  

                            echo "<li><a style='text-transform: none; color:#333; font-size: 14px;'>".date('F', mktime(0, 0, 0, $month, 1, 2000))."</a><ul>"; //month

                            $sql4 = mysqli_query($con, "SELECT * FROM posts WHERE MONTH(post_date)='$month' AND YEAR(post_date)='$year' ORDER by post_date DESC");
                            while($row4 = mysqli_fetch_assoc($sql4)){ 
                                $title2 = $row4['post_title']; 
                                echo "<li><a style='text-transform: none; color:#333; font-size: 12px;' href='pages.php?id={$row4['post_id']}'>".$title2."</a></li>";//title
                            } 
                        }  
                        echo "</ul></li>"; //end month
                    } 
                echo "</ul></li>"; //end year
                }  
            } 
            echo "</ul></div>"; 

}
?>

---

无论如何，感谢那些试图解决我的问题的人。

如果您可以在PHP生成HTML时添加HTML，那么就可以更容易地确定问题。您能在使用此代码的地方添加一个链接吗？css似乎在制造一个问题，问题在于if语句中的event.target是2014，而this=='li'元素。这就是为什么你的点击处理程序永远不会被执行。事实上，我认为“如果”的说法在这里是多余的。要解决此问题，您需要删除标记或更好地删除“if”语句，在这种情况下，您不需要检查事件目标。我尝试删除标记和if语句，但仍然不起作用。我仍然想知道为什么在fiddle中代码可以很好地工作，而在我的php中却不能。

<?php 
            include("connection/connect.php"); 

            $select_posts = "SELECT post_id,post_date,post_title, YEAR(post_date) AS YEAR, MONTH(post_date) AS MONTH, COUNT(*) AS postCount FROM posts";

            $run_posts = mysqli_query($con, $select_posts);

            while ($row = mysqli_fetch_array($run_posts)){

            $sql2 = mysqli_query($con, "SELECT DISTINCT YEAR(post_date) FROM posts ORDER BY YEAR(post_date) DESC");
            echo "<div id='nav'><ul>";

            while($row2 = mysqli_fetch_assoc($sql2)){ 
                foreach ($row2 as $year) {  
                echo "<li class='current'><b>$year</b><ul>"; //year
                    $sql3 = mysqli_query($con, "SELECT DISTINCT MONTH(post_date) FROM posts WHERE YEAR(post_date)='$year' ORDER by MONTH(post_date) DESC");

                    while($row3 = mysqli_fetch_assoc($sql3)){ 
                        foreach ($row3 as $month) {  

                            echo "<li><a style='text-transform: none; color:#333; font-size: 14px;'>".date('F', mktime(0, 0, 0, $month, 1, 2000))."</a><ul>"; //month

                            $sql4 = mysqli_query($con, "SELECT * FROM posts WHERE MONTH(post_date)='$month' AND YEAR(post_date)='$year' ORDER by post_date DESC");
                            while($row4 = mysqli_fetch_assoc($sql4)){ 
                                $title2 = $row4['post_title']; 
                                echo "<li><a style='text-transform: none; color:#333; font-size: 12px;' href='pages.php?id={$row4['post_id']}'>".$title2."</a></li>";//title
                            } 
                        }  
                        echo "</ul></li>"; //end month
                    } 
                echo "</ul></li>"; //end year
                }  
            } 
            echo "</ul></div>"; 

}
?>